Imaging of Communicating Hydrocephalus.

Area of Science:

• Neurosurgery
• Radiology
• Neurology

Background:

• Hydrocephalus is characterized by increased cerebrospinal fluid (CSF) volume within the ventricles.
• The definition and classification of hydrocephalus have been subjects of long-standing debate.
• International workgroups have recently established a more standardized approach.

Purpose of the Study:

• To review the most recent and consensually accepted definitions and classifications of hydrocephalus.
• To clarify the distinction between communicating and noncommunicating hydrocephalus.
• To provide a foundation for understanding hydrocephalus subtypes.

Main Methods:

• Literature review of recent international consensus statements.
• Analysis of historical and current classification schemes for hydrocephalus.
• Synthesis of proposed nomenclature for hydrocephalus categorization.

Main Results:

• Conventional classifications (obstructive/nonobstructive, communicating/noncommunicating) have inherent confusion.
• A proposed precise nomenclature divides hydrocephalus into communicating (with or without CSF absorption obstruction) and noncommunicating (with definite CSF absorption obstruction).
• This article focuses on communicating hydrocephalus, with a subsequent article addressing noncommunicating hydrocephalus.

Conclusions:

• A more precise definition and classification of hydrocephalus are emerging from international consensus.
• Distinguishing between communicating and noncommunicating hydrocephalus is crucial for accurate diagnosis and management.
• The proposed nomenclature aims to reduce ambiguity in hydrocephalus classification.